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Thermohydrodynamics of boiling in a van der Waals fluid
Aalto University School of Science, Aalto, Finland.
KTH.
Aalto University School of Science, Aalto, Finland / own University, Providence, United States.
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2012 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 85, no 2, 026320Article in journal (Refereed) PublishedText
Abstract [en]

We present a modeling approach that enables numerical simulations of a boiling Van der Waals fluid based on the diffuse interface description. A boundary condition is implemented that allows in and out flux of mass at constant external pressure. In addition, a boundary condition for controlled wetting properties of the boiling surface is also proposed. We present isothermal verification cases for each element of our modeling approach. By using these two boundary conditions we are able to numerically access a system that contains the essential physics of the boiling process at microscopic scales. Evolution of bubbles under film boiling and nucleate boiling conditions are observed by varying boiling surface wettability. We observe flow patters around the three-phase contact line where the phase change is greatest. For a hydrophilic boiling surface, a complex flow pattern consistent with vapor recoil theory is observed.

Place, publisher, year, edition, pages
2012. Vol. 85, no 2, 026320
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:sh:diva-30139DOI: 10.1103/PhysRevE.85.026320ISI: 000300941500003ScopusID: 2-s2.0-84857753530OAI: oai:DiVA.org:sh-30139DiVA: diva2:932503
Funder
Swedish e‐Science Research Center
Available from: 2012-04-18 Created: 2016-06-01 Last updated: 2016-06-01Bibliographically approved

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Do-Quang, MinhAmberg, Gustav
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